Is it possible to pull data from the cash register into the application on Android?

Question

Android

Dear colleagues, good day. After a long search on the web, I wandered into a dead end, I hope you can help me.
Essence of the question:
Is it possible to pull up data from cash registers by the presence or absence of something in the institution.
I want to implement a client application for a bar, namely with a reservation or pre-order function, but I don’t know how to pull up data from the cash register so that the application shows the presence or absence of certain products.
I really hope you can help me, thanks in advance!

Answer 1

what do you call a bar counter?
If we are talking about atol-type cash registers, then there is no nomenclature and stock balances in it.
If you call Frontol software a cash desk, then this is not a dogma. In the software market for automating cafes and bars, it's still a zoo.
Well, as I understand it, you can forget about practical implementation for the next six months